On the morphology and life-history of Monascus [= Haplocladus] filiformis (Rudolphi, 1819) Looss, 1907 and Steringophorus furciger (Olsson, 1868) Odhner, 1905 (Trematoda, Fellodistomidae). - Køie, M. (Ophelia, 1979)